Conservative social policy - an oxymoron?

In the news today...

Cameron said he continued to believe that the main cause of social breakdown -
which he described as "the big question of our times" - was family separation.

...which is great, obviously. Not simplistic at all.

But is the left is equally simplistically arguing the counter - social breakdown causes family separation? Clearly the two are related, and reinforce each other, but are complicated by othr factors including education, economics and much else. Who really convinces on these issues?